Volume 14, Issue 1, January 2015, Pages 10-21
A. El-Sherif; S. Gad; A. Khalil; Rabab El-Mohamedy
Volume 13, Issue 2, July 2014, Pages 67-80
A. El-Sherif; A. Nour El-Deen; S. Gad; H. El-Nahas